mstechca said:
I'm wondering because I want to avoid measuring 100 resistors with an ohmmeter, and finding 12 or more that are exactly the same value.
I would suggest buying 1% resistors, as you've not much chance of matching them that closely on your meter - which is probably no better than 1% anyway, and will be at least +/1 one digit as well.
Obviously this makes it pointless building a 12 bit DAC, but 10 bits would be plenty - and having 1024 different voltages is much more than enough for the full FM band.
But I would suggest you forget the DAC altogether for now! - use a simple potentiometer to provide the voltage for the varicap, and proof it works, and that you have sufficient tuning range. Once that's working fine, THEN start trying to replace it with a switched solution.